<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    var myMath = {
      min: function() {
        var min = arguments[0]
        for(var i = 1; i < arguments.length; i++) {
          if(min > arguments[i]) {
            min = arguments[i]
          }
        }
        return min
      },
      max: function() {
        var max = arguments[0]
        for(var i = 1; i < arguments.length; i++) {
          if(max < arguments[i]) {
            max = arguments[i]
          }
        }

        return max
      },
      PI: 3.1415926
    }

    console.log( myMath.max(1, 3, 5, 2, 4) )  // 5
    console.log( myMath.min(1, 3, 5, 2, 4) )  // 1
    console.log( myMath.PI )
  </script>
</body>
</html>